title: Friend or foe? The biological discrimination.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D000937:Antigen-Antibody Reactions; D001402:B-Lymphocytes / Q000276:immunology; D001666:Binding Sites, Antibody; D002465:Cell Movement; D002645:Chickens; D005260:Female; D006649:Histocompatibility Antigens / Q000235:genetics; D006801:Humans; D007108:Immune Tolerance; D007111:Immunity, Cellular; D007143:Immunoglobulin Heavy Chains / Q000235:genetics; D007147:Immunoglobulin Light Chains / Q000235:genetics; D008214:Lymphocytes / Q000276:immunology; D008297:Male; D008431:Maternal-Fetal Exchange; D051379:Mice; D011247:Pregnancy; D011948:Receptors, Antigen, T-Cell; D011971:Receptors, Immunologic; D011975:Receptors, Mitogen; D012552:Schistosomiasis / Q000276:immunology / Q000469:parasitology; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D006649:Histocompatibility Antigens; D007143:Immunoglobulin Heavy Chains; D007147:Immunoglobulin Light Chains; D011948:Receptors, Antigen, T-Cell; D011971:Receptors, Immunologic; D011975:Receptors, Mitogen